I am always suspicious when one change or issue solves all other issues. Thus I am suspicious of Dr. Davis who attributes much of our modern dietary issues to wheat. However with 30% of the US populace having the genes that may express themselves as wheat allergy, celiac disease, and gluten sensitivity, it seems to me that this doctor's argument needs to be considered. (Celiac is a nasty disease that eats away at your small intestine from wheat allergy.) With 20% of our dietary calories coming from wheat, and with 30% of the US population as potential victims of gluten sensitivity, some caution is needed.
If you decide to watch this presentation, you may be surprised that within modern memory the wheat genome has been drastically changed to a variety that alters the gliadin in wheat which intertwines with gluten. This may be the reason the celiac disease is on the increase.
On a personal note my doctor took my blood and did a gluten sensitivity. I am very gluten sensitive. This was somewhat surprising as I had no symptoms that I associated with eating wheat. But then again most people don't. 80% of the populace that has celiac disease does not know it. The fact that allergy issues with wheat are much larger than are perceived by the public is not in dispute. I had recently lost about 40 pounds by a combination of limiting carbs to 120 grams and limiting calories, or better said I became aware of my calories. 120 grams is way too high to be considered low carb. But while I had limited my bread intake, I had been eating a cereal based on "healthy" wheat germ and the bread I did use was a high protein bread. Care to guess what the first ingredient of the bread was? Yes, that is right, gluten. Healthy wheat germ is filled with it as well. While I had limited my carbs I had probably quadrupled my gluten. This was a major whoopsie on my part.
Am I saying you should stop eating wheat immediately? No. But I am saying that it is something to think about. I do feel better now that I am not eating any wheat, but of course this could be a placebo effect. While there are various tests, the incidence of false negatives is very high. The best way is to eliminate wheat from your diet for a time and see how it effects you. You must be very strict or you will not know for sure. (BTW this is a lot more involved than not eating bread, wheat is in everything, often unexpectently. Soy sauce is a good example of this.) Something to consider, if this doctor is even partially right.